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Lucas Carlson has lifted a few method ideas from Python: starts_with? and ends_withs?, as well as in?. Which got me thinking about an unfinished thought from FOSCON. I’d really like Python’s dict method.

Python’s Dictzip maneuvre:

 >> keys = ['a', 'b', 'c']
 >> values = [1, 2, 3]
 >> dict(zip(keys, values))
 => {'a': 1, 'b': 2, 'c': 3} 

A Ruby translation might go like:

 >> keys = ['a', 'b', 'c']
 >> values = [1, 2, 3]
 >> Hash[keys.zip(values)]
 => {'a' => 1, 'b' => 2, 'c' => 3}

Here’s the code:

  def Hash.[]( enum )
    enum.inject({}) do |hsh,(k,v)| 
      hsh[k] = v
      hsh
    end
 end

I know there’s already a Hash::[] but I really like this better. An array of pairs makes so much more sense than a flattened array of arbitrary length.